Just what we needed! After trial and error with measuring and purchasing, what we thought were incorrect sizes of slipcovers, it turns out we only needed these grips! They tuck once and stay in place. We sit, lay, roll around and the slipcover not only stays in place but keeps the sofa from looking disheveled. No more resetting the slipcover every time someone gets up. The instructions are pretty clear, but as my daughter and I learned, when you think you tucked (aka pushed) the grips down all the way, push them in a little further then they stay.